TypeScript入门笔记

1//初始化项目
2npm init
3
4//安装typescript
5npm install  typescript
6
7//创建一个typescript文件 test.ts
8//编译test.ts文件
9tsc test.ts
10
11//class代码范例
12
13class Person{
14  protected name: String;
15  constructor(name:string){
16      this.name=name;
17  }
18  greet(){
19    return `${this.name}向你问好`;
20  }
21}
22class Student extends Person{
23  private major:string;
24
25  constructor(name:string,major:string){
26    super(name);
27    this.major=major;
28  }
29  studentGreet(){
30    return  `${this.major}系的${this.name}向你问好`;
31  }
32}
33let xiaoming=new Student('小明','哲学');
34console.log(xiaoming.studentGreet());